Isabella Capital Management LLP — 13F Filing Insights (Q1 2026): Charts & API Access

Isabella Capital Management LLP's disclosed holdings carry a Herfindahl concentration index of 0.260 — mathematically equivalent to about 4 equally-sized positions, well below its 9 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.

Position sizes are fairly uniform across the portfolio (a coefficient of variation of 1.11), suggesting a disciplined, rules-based approach to how much capital goes into each idea.

Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 12.6 percentage-point tilt) — a pattern consistent with a momentum-following approach.

Sector classification currently covers about 60% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.